Kedis ku xidhan hagaha · Dhexdhexaad Heerka

Luminta Focal ee Kediska Ogaanshaha Isku-dheellitir la'aanta

Wuxuu hubiyaa modulator-ka khasaaraha-focal, dheelitir la'aanta fasalka, doorka alfa iyo gamma, iyo sida wanaagsan ee loo soocay iyo tusaalooyinka adag u kala duwan yihiin.

Wadooyinka haga ee la xidhiidhaLuminta Focal ee Ogaanshaha Isku-dheellitir la'aanta
Su'aal 1 ee 8

Waa maxay dhibatada udub dhexaadka u ah ogaanshaha shayga hal-heer ah ee luminta xudunta u ahayd in wax laga qabto?

Horudhac su'aal kasta8 su'aalo

Jawaabaha iyo sharraxaadaha waxay soo baxayaan markaad qaadanayso kediska.

  1. Waa maxay dhibatada udub dhexaadka u ah ogaanshaha shayga hal-heer ah ee luminta xudunta u ahayd in wax laga qabto?
    • Isku dheelitir la'aan ba'an oo udhaxeysa walxaha hore ee dhifka ah iyo asalka fudud ee badan
    • Xawaaraha ka fiirsashada aayar ee laba-heer-sheegayaasha
    • La'aanta xogta tababarka calaamadeysan
    • Ku-habboonaanta walxaha waaweyn
  2. Waa maxay qodobka wax-ka-beddelka ah ee luminta focalku ku dhufto isku-tallaabta-entropy?
    • log(p_t)
    • (1 - p_t)^gamma
    • p_t^2 kaliya
    • 1 / p_t
  3. Maxaa ku dhacaya luminta focalka marka cabbirka diiradda saaraya gamma laga dhigo 0?
    • Waxa ay noqotaa khalad afar geesle ah
    • Waxay iska indha tirtaa dhammaan tusaalooyinka wanaagsan
    • Waxay noqotaa iskutallaabta caadiga ah
    • Waxay u kala baxdaa infinity
  4. Muxuu kordhinayaa gammadu ka qabtaa tusaalooyin fudud oo si wanaagsan loo soocay?
    • Waxay kordhisaa waxtarkooda khasaare
    • Wax ku biirintooda waxba kama beddelin
    • Waxay ka saartaa kaydka xogta
    • Waxay si xooggan u xakameysaa wax ku biirintooda khasaaraha
  5. Qalabkee baadhaha naqshadeeyayaasha keenay luminta focal?
    • RetinaNet
    • YOLOv1
    • Degdeg R-CNN
    • AlexNet
  6. Doorkee ayuu cabbirka alfa caadi ahaan ka garab ciyaara gamma?
    • Waxay dejisaa heerka waxbarashada
    • Waxay miisaamaysaa miisaanka qaraabada ee fasallada togan iyo kuwa taban
    • Waxay xakameysaa xallinta sawirka
    • Waxay qeexaysaa tirada sanduuqyada barroosinnada
  7. For a hard example with p_t close to zero, what is the focal modulating factor (1 − p_t)^gamma likely to do?
    • Drive the factor to zero
    • Turn the example into a positive label
    • Keep the factor relatively close to one so the example retains substantial loss weight
    • Replace the cross-entropy term with alpha
  8. A dense detector has many easy background locations. What effect does focal loss aim to have on their combined training influence?
    • Increase their count by duplicating them
    • Remove all positive object examples
    • Make every example receive an identical loss
    • Reduce their dominance so training can focus more on sparse hard examples